Car-coupling.



No. 632,302. Patented Sept. 5, I899.

J. T. WILSON.

GAR COUPLING.

(Application filed Kay 20, 1899.)

(No Model.)

WEE/U08 EE WITNESSES: m 61 W ATTORNEY 1': mums man: an. mmumo. WASNINGTON. o. e

PATENT JOHN T. IVILSON, OF PITTSBURG, PENNSYLVANIA.

CAR-COUPLING.

SPECIFICATION formingpart of Letters Patent No. 632,302, dated September 5, 1899. Application filed May 20, 1899. Serial No. 717,598.' (No model.)

T0 at whom it may concern:

Be it known that I, JOHN T. WILSON, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Oar-Couplings; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to car-couplings, has especial reference to thatclass known among railroad men as the J anney type or the Master Oar-Builders couplings, and has for its object certain improvements in construction of the pin to prevent accidental uncoupling by the jumping or creeping out of engagement with the tongue or tailpiece of the hook by jolts or jars or the gradual raising of the pin by the tongue; and it consists in certain constructions of the draw-head and the pin, which will be fully disclosed in the following specification and claims.

In the accompanying drawings, which form part of this specification, Figure 1 represents a side elevation of a draw-bar, illustrating the application of my invention, with the hook or jaw open and the pin raised, with its notch or recess in position for the tongue of the hook to pass the pin; Fig. 2, a like view showing the hook closed and the tongue locked by the pin;

- Fig. 3, an enlarged detail of the pin, and Fig. at

a like view of a modified form of the pin.

Reference being had to the drawings and the letters thereon, A indicates the head of a draw-bar, B the body or shank, O the hook or jaw, all of which may be of any approved pattern, and D the pin or latch, which with its coacting parts constitute the vital part of my present invention.

The gravity pins or latches for this class of couplings as usually constructed frequently become displaced by a sudden jolt or jar, or they rise gradually and imperceptibly by the motion of the tongue and its pressure against the pin, producing what is known among trainmen as creeping of the pin and by which the pin finally rises high enough to release the hook and sever the couplings between two cars. T o overcome this serious defect, the pin D is provided with a laterallyprojecting stud a or a continuous spiral lateral projection b, which engages a verticallyinclined groove 0 in a boss or vertical extension d on the upper side of the body of the draw-bar, and with a lever e, by which the pin is raised and lowered by the trainmen to couple and uncouple a train. The pin is also provided with a groove f, through which the end of the tongue g of the hook or jaw passes 'as the hook engages with the hook of the coupling on an adjacent car, and the pin is supported by a collar h, resting on the upper surface of the boss d when the pin is down. After the coupling-has been made the pin D is lowered, the groove f being'turned on the rear or opposite side from the mouth of the draw-bar, as shown in Fig. 2.

The pin has two motions imparted to it as it is raised and lowerednamely, vertical and axial or rotarythe latter being equal to onehalf of a revolution to present the groove fin line for the tongue of the hook to pass through it in the upstroke and to restore or return the groove to its normal position in the downstroke.

The stud a or the projection 19 on the pin D produces sufficient resistance in the groove 0 to prevent the pin jumping or creeping, and thereby accidentally uncoupling a train while in motion.

Having thus fully described my invention, what I claim is 1. In a car-coupling, the combination of a laterally-swinging hook, a pin engaged by the tongue of the hook and having a groove normally on the rear side thereof for the passage of the tongue, and means for eifecting vertical and axial or rotary movements of the pin to couple and uncouple. v

2. In a coupling, the combination of a laterally-swinging hook, a pin vertically and axially movable and engaged by the tongue of the hook and having a lateral projection on the body thereof, and a vertically-inclined groove in the draw-bar engaged by the projection on the pin.

In a car-coupling, the combination of a laterally-swinging hook, a pin engaged by the tongue of the hook and movable vertically and on its axis and provided with a lateral projection on the body thereof, and a spiral groove in the draw-bar engaged by the projection on the pin. t

In testimony whereof I affix my signature in presence of two witnesses.

JOHN T. WILSON.

lVitnesses:

M. W. PARTRIDGE, J. E. KAVANAUGH. 

